Fine tuning of supported covalent organic framework with molecular active sites loaded as efficient electrocatalyst for water oxidation

Gan, Zongliang; Lu, Shuanglong; Qiu, Li; Zhu, Han; Gu, Hongwei

doi:10.1016/j.cej.2020.127850

Cited by 19 publications

(17 citation statements)

References 42 publications

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“…Metalloporphyrins are an important class of macrocyclic complexes that have shown outstanding activities for the HER and OER. − However, the efficiency and conductivity of these molecular catalysts are relatively low. In order to make these well-designed molecular catalysts practical, they need to be immobilized on conductive electrode materials such as carbon nanotubes (CNTs), graphene oxide (GO), and so forth. ,,− In general, there are two strategies to immobilize molecular catalysts on conductive materials.…”

Section: Introductionmentioning

confidence: 99%

Covalent Metalloporphyrin Polymer Coated on Carbon Nanotubes as Bifunctional Electrocatalysts for Water Splitting

Wang

Song

et al. 2022

Inorg. Chem.

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Metalloporphyrins have exhibited excellent electrocatalytic activities for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). In order to improve the efficiency and conductivity, these molecular catalysts need to be immobilized on conductive electrode materials. Herein, a facile "one-pot" strategy was developed to coat a covalent metalloporphyrin polymer on a carbon nanotube (CNT) as bifunctional catalysts [denoted as MTIPP@CNTs, H 2 TIPP = 5,10,15,20-tetra(4-(imidazole-1-yl)phenyl)porphyrin)] for water splitting in alkaline solution. MTIPP@CNTs have shown excellent electrocatalytic activities for both the HER and OER when metalloporphyrin's central metal is optimized as well as the amount of catalysts that is loaded on the CNT. The overpotential (η 10 ) of NiTIPP@CNT-2 for the OER is only 320 mV at a current density of 10 mA cm −2 in 1.0 M KOH, and CoTIPP@CNT-1 exhibited an excellent electrocatalytic activity for the HER (η 10 = 450 mV for 10 mA cm −2 ). Furthermore, the remarkable bifunctional electrocatalytic performance (a cell voltage of 2.04 V with a current density of 10 mA cm −2 ) was also explored in the overall water splitting test.

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Section: Introductionmentioning

confidence: 99%

Covalent Metalloporphyrin Polymer Coated on Carbon Nanotubes as Bifunctional Electrocatalysts for Water Splitting

Wang

Song

et al. 2022

Inorg. Chem.

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“…While the CNT component with porous structure and high conductivity also promotes the electrocatalytic performance and accelerates the mass transfer to facilitate the ORR. Fine tuning of COFs layers and active sites loading while constructing COFbased CNT electrocatalyst has been investigated by Gan et al [171] As shown in Figure 10a, a class of typical COF-coated MWCNTs (COF-366-yCo@CNT-x) was synthesized through imine condensation, then Co ions were introduced to coordinate with the porphyrin units as active centers for electrocatalytic OER in alkaline environment. High-resolution TEM (HRTEM) image (Figure 10b) and the obvious lattice fringes of the COF component reveals that the COF layers are orderly stacked on the surface of the CNT with a thickness of 3-7 nm.…”

Section: Cof-based Carbon Hybridsmentioning

confidence: 99%

“…The synergistic interaction between the metal hydroxide NPs and the COF platform was analyzed though DFT calculation. It was suggested that the favorable configuration [171] Copyright 2020, Elsevier. (e,f) Adapted with permission.…”

Section: Cof-based Other Metal Compound Hybridsmentioning

confidence: 99%

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Covalent Organic Framework (COF)‐Based Hybrids for Electrocatalysis: Recent Advances and Perspectives

Tang

Shao

2021

Small Methods

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Developing highly efficient electrocatalysts for renewable energy conversion and environment purification has long been a research priority in the past 15 years. Covalent organic frameworks (COFs) have emerged as a burgeoning family of organic materials internally connected by covalent bonds and have been explored as promising candidates in electrocatalysis. The reticular geometry of COFs can provide an excellent platform for precise incorporation of the active sites in the framework, and the fine‐tuning hierarchical porous architectures can enable efficient accessibility of the active sites and mass transportation. Considerable advances are made in rational design and controllable fabrication of COF‐based organic–inorganic hybrids, that containing organic frameworks and inorganic electroactive species to induce novel physicochemical properties, and take advantage of the synergistic effect for targeted electrocatalysis with the hybrid system. Branches of COF‐based hybrids containing a diversity form of metals, metal compounds, as well as metal‐free carbons have come to the fore as highly promising electrocatalysts. This review aims to provide a systematic and profound understanding of the design principles behind the COF‐based hybrids for electrocatalysis applications. Particularly, the structure–activity relationship and the synergistic effects in the COF‐based hybrid systems are discussed to shed some light on the future design of next‐generation electrocatalysts.

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“…The main reason that COFs usually show extremely low catalytic activity is lacking of the active sites. [79][80][81] Based on this view, the most commom strategy to improve the catalytic performance of COFs for OER was decorating the active metal on the backbone in various pathways. For example, Thomas and co-workers reported a programmable strategy to synthesize 2D Co-doped COF (Macro-TpBpy-Co) with microporous and uniform macroporous structure by template-induction (Figure 10a).…”

Section: Oermentioning

confidence: 99%

Strategies for Improving the Catalytic Performance of 2D Covalent Organic Frameworks for Hydrogen Evolution and Oxygen Evolution Reactions

Deng

Wang

Chen

et al. 2021

Chemistry An Asian Journal

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Hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) have been deemed as clean and sustainable strategies to solve the energy crisis and environmental problems. Various catalysts have been developed to promote the process of HER and OER. Among them, twodimensional covalent organic frameworks (2D COFs) have received great attention due to their diverse and designable structure. In this minireview, we mainly summarize the diverse linkages of 2D COFs and strategies for enhancing the catalytic performance of 2D COFs for HER and OER, such as introducing active building blocks, metal ions and tailored linkages. Furthermore, a brief outlook for the development directions of COFs in the field of HER and OER is provided, expecting to stimulate new opportunities in future research.

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Fine tuning of supported covalent organic framework with molecular active sites loaded as efficient electrocatalyst for water oxidation

Cited by 19 publications

References 42 publications

Covalent Metalloporphyrin Polymer Coated on Carbon Nanotubes as Bifunctional Electrocatalysts for Water Splitting

Covalent Metalloporphyrin Polymer Coated on Carbon Nanotubes as Bifunctional Electrocatalysts for Water Splitting

Covalent Organic Framework (COF)‐Based Hybrids for Electrocatalysis: Recent Advances and Perspectives

Strategies for Improving the Catalytic Performance of 2D Covalent Organic Frameworks for Hydrogen Evolution and Oxygen Evolution Reactions

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